func isInternetAvailable() -> Bool
{
var zeroAddress = sockaddr_in()
zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
zeroAddress.sin_family = sa_family_t(AF_INET)
let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
$0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in
SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)
}
}
var flags = SCNetworkReachabilityFlags()
if !SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) {
return false
}
let isReachable = flags.contains(.reachable)
let needsConnection = flags.contains(.connectionRequired)
return (isReachable && !needsConnection)
}
func noInternetConnectionError(atVC: UIViewController, tryAgain: @escaping () -> ()) -> () {
let noConnectionAlert = UIAlertController(title: "No internet connection",
message: "",
preferredStyle: UIAlertControllerStyle.alert)
noConnectionAlert.addAction(UIAlertAction(title: "Try again", style: .default,
handler: { (action: UIAlertAction!) in
tryAgain()
}))
atVC.present(noConnectionAlert, animated: true, completion: nil)
}
